sequencer.js

sequencer-tests.js

shiv.addOnLoad(function() {
  var seq = new Sequencer([
    function(cb) {
      shiv.log("Log callback 1");
      cb && cb();
    },
    function(cb) {
      shiv.log("Log callback 2");
      cb && cb();
    },
    function(cb) {
      shiv.log("Log callback 3");
      cb && cb();
    }
  ]);

  seq.start();
});

sequencer.js

//
// sequencer.js - sequencer implementation
//

Sequencer = function(arr, opts) {

  arr  = arr || [];

  var running = false;
  var self    = this;

  this.isRunning = function() {
    return running;
  };

  this.start = function(cb) {
    cb && self.add(cb);
    running = true;
    this.next();
  };


  this.stop = function() {
    running = false;
  };

  this.startCallback = function(cb) {
    return function() {
      self.next();
    };
  };

  this.add = function(cb) {
    arr.push(cb);
  };

  this.next = function() {
    if (running && (arr.length != 0)) {
      arr.shift()(function() {
          self.next();
        });
    }
  };

};